Adjustable arch support



FIG. 1 is an environmental perspective view of an adjustable arch support showing my new design;

FIG. 2 is an enlarged front elevational view thereof;

FIG. 3 is an enlarged rear elevational view thereof;

FIG. 4 is an enlarged top plan view thereof;

FIG. 5 is an enlarged left side view thereof;

FIG. 6 is an enlarged right side view thereof; and,

FIG. 7 is an enlarged bottom plan view thereof. 

The ornamental design for an adjustable arch support, as shown and described. 